This DBS-C01 practice question tests your understanding of database security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company has an Amazon DynamoDB table with a global secondary index (GSI). The security team wants to ensure that only certain attributes are returned in query results based on the IAM policy of the calling user. What is the most secure and scalable approach?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use IAM condition keys with 'dynamodb:Attributes' to restrict access to specific attributes.
Option C is correct. Using IAM condition keys with 'dynamodb:Attributes' allows fine-grained access control at the attribute level. This is the recommended way to restrict access to specific attributes. Option A is incorrect because attribute-level IAM policies can be applied without VPC endpoints. Option B is incorrect because DynamoDB does not support column-level security through Lambda. Option D is incorrect because modifying the GSI to include only allowed attributes would require multiple GSIs and is not scalable.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use an AWS Lambda function as a middleware to filter attributes before returning results.
Create multiple global secondary indexes that include only the allowed attributes for each user group.
Why it's wrong here
This approach is not scalable and increases cost.
✓
Use IAM condition keys with 'dynamodb:Attributes' to restrict access to specific attributes.
Why this is correct
IAM policies can limit which attributes are returned in query results.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a VPC endpoint for DynamoDB and attach a bucket policy that limits attribute access.
Why it's wrong here
Bucket policies are for S3, not DynamoDB.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Database Security — This question tests Database Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use IAM condition keys with 'dynamodb:Attributes' to restrict access to specific attributes. — Option C is correct. Using IAM condition keys with 'dynamodb:Attributes' allows fine-grained access control at the attribute level. This is the recommended way to restrict access to specific attributes. Option A is incorrect because attribute-level IAM policies can be applied without VPC endpoints. Option B is incorrect because DynamoDB does not support column-level security through Lambda. Option D is incorrect because modifying the GSI to include only allowed attributes would require multiple GSIs and is not scalable.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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